3 ms·

Since when `{...}' syntax is a glob pattern? What does `{a,b}/c' produce when there is no directory named `a'?

• hidroto 8mo ago
  would it not just produce 'b/c'? assuming 'b/c' is an existent file path what else could you justify it doing?
  • thayne 8mo ago
    The behavior of bash would be to produce "a/c" and "b/c", even if both files don't exist
    • frizlab 8mo ago
      zsh too
    • sgbeal 8mo ago
      > The behavior of bash would be to produce "a/c" and "b/c", even if both files don't exist In bash patterns like {a,b} aren't glob-expansion expansions, they're string operations, and those resolve before glob expansions. You can confirm this with: ls /{nope,tmp}
  • oguz-ismail2 8mo ago
    What sibling comment says. Bash does suppress nonexistent products when the pattern includes a glob metacharacter and `shopt -s nullglob' is in effect, but I didn't see a flag or anything to achieve that in the project README.
    • deleted 8mo ago
      [deleted]
• Spivak 8mo ago
  Globbing is a matching library. It just means match a/c or b/c if they exist. You should get an iterator of somewhere between zero and two elements.
• neogoose 8mo ago
  Since glibc (better to say csh) implemented it. https://man7.org/linux/man-pages/man3/glob.3.html https://man7.org/linux/man-pages/man3/glob.3.html search for GLOB_BRACE